CN103046465A - Reinforcing construction method for foam core die precast hollow plate beam - Google Patents
Reinforcing construction method for foam core die precast hollow plate beam Download PDFInfo
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- CN103046465A CN103046465A CN2012101556754A CN201210155675A CN103046465A CN 103046465 A CN103046465 A CN 103046465A CN 2012101556754 A CN2012101556754 A CN 2012101556754A CN 201210155675 A CN201210155675 A CN 201210155675A CN 103046465 A CN103046465 A CN 103046465A
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- 239000006260 foam Substances 0.000 title claims abstract description 68
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 105
- 239000010959 steel Substances 0.000 claims abstract description 105
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000002787 reinforcement Effects 0.000 claims description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 14
- 238000012546 transfer Methods 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229920006327 polystyrene foam Polymers 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 239000002775 capsule Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The invention discloses a reinforcing construction method for a foam core die precast hollow plate beam. The reinforcing construction method comprises a first step of first fixing a steel strand on a precast pedestal and performing initial tensioning, and binding a base plate rebar layer and a web plate rebar layer together; a second step of installing a foam core die and a top plate rebar layer; a third step of integrally tensioning the steel strand; a fourth step of erecting a steel outer die; a fifth step of arranging a fastening system on the outer side of the steel outer die, and enabling a support back rib of the fastening system to be tightly pressed on the steel outer die; a sixth step of arranging a pressure lever assembly at the position of a top opening of the steel outer die after steel outer die adjustment is finished; a seventh step of pouring concrete; and an eighth step of performing concrete curing to an age, dismantling the fastening system and the steel outer die, releasing the steel strand, and making the foam core die precast hollow plate beam. According to the reinforcing construction method for the foam core die precast hollow plate beam, the core die can be effectively prevented from floating upwards, design thicknesses of a hollow plate beam top plate and a web plate are guaranteed, and one-time pouring forming can be achieved.
Description
Technical field
The present invention relates to the civil engineering manufacturing job practices of concrete prefabricated element, especially a kind of manufacture craft of foam core moulds precast hollow plate-girder.
Background technology
Along with the development of highway construction project, it is ripe that the structure design of simply supported beam has been tending towards, and its construction technology is simpler, is convenient to the scale centralized production, is used widely in the highway in China bridge.But, find in a lot of workmanship inspections that in recent years the part engineering hollowcore slab simply supported beam time that puts into effect shortly vertical minute crack just occurred, affect the engineering useful life longevity.By analysis, main cause is that top board and web thickness deficiency cause.So in the construction of hollow slab beam, controlroof and web thickness are the emphasis of construction, also are difficult points.At home, generally use traditional air capsule as inner die, though it is reusable in the highway bridge hollowcore slab prefabricated construction, but on the high side, the prefabricated needs two cover air capsule inner die of monolithic hollowcore slab, the end-blocking concrete of also will constructing after the demoulding, operation is assorted many; The degree of inflation of air capsule inner die, come-up control and demould time are wayward, cause easily hollowcore slab top board and web thickness deficiency and the generation engineering defect.
A kind of hollow slab beam with foam core moulds is disclosed in patent ZLCN201120241280.7, the hollow slab beam preparation method that discloses in this patent document manual, still can not effectively stop core to float, overcome the problem of top board and web thickness deficiency, and need to carry out several times concreting and maintenance, can not once finish.
Summary of the invention
The purpose of this invention is to provide a kind of core that can effectively stop and float, guarantee the design thickness of precast hollow slab back plate and web, but and a kind of foam core moulds precast hollow slab beambracing job practices of one-time-concreting moulding.
For achieving the above object, the present invention adopts following technical scheme: a kind of foam core moulds precast hollow slab beambracing job practices, comprise following processing step: (one). first at the fixing steel strand and carry out initial tensioning of precast pedestal, the two web reinforcement layer colligation of top, baseplate reinforcing bar layer both sides being stood at horizontally disposed baseplate reinforcing bar layer and interval with iron wire together, baseplate reinforcing bar layer and web reinforcement layer all are positioned at the precast pedestal top, steel strand are positioned at baseplate reinforcing bar layer place, with iron wire concrete pad outside the downside colligation of baseplate reinforcing bar layer respectively, at the upside of baseplate reinforcing bar layer and the inboard colligation inner concrete cushion block of web reinforcement layer, at this moment the baseplate reinforcing bar layer that colligation is good and web reinforcement layer prop up stand on the precast pedestal fully, (2). the foam core moulds level of column is placed in the U-shaped space that baseplate reinforcing bar layer and two web reinforcement layers enclose, foam core moulds for be horizontally disposed with and with the web reinforcement layer, the baseplate reinforcing bar layer, steel strand, before and after being, extends precast pedestal, to be horizontally disposed with iron wire, the top board steel bar layer colligation that extend front and back is between two web reinforcement layer top, at top board steel bar layer downside also colligation inner concrete cushion block, the top board steel bar layer is positioned at the top of foam core moulds, (3). the integral tension steel strand, (4). step (one)---in arbitrary step of (three) outside the colligation of the web reinforcement outside concrete pad, and then Zhi Ligang external mold, the steel external mold is penetrating up and down, around the outside of two web reinforcements and the front and back end of foam core moulds, the bottom nozzle inner wall surrounding of steel external mold is close to the surrounding of precast pedestal, (5). at the arranged outside fastening system of steel external mold, fastening system comprises that pair of opposing is in the support back of the body rib of steel external mold both sides, press two to support back of the body rib to tighten up the both sides of steel external mold by the top, (6). after the adjustment of steel external mold is complete, pressure thick stick assembly is set at mouth place, the top of steel external mold, (7). concreting, when concreting to top board steel bar layer top, and contain the foam core moulds end face fully, remove and press the thick stick assembly, continue again concreting to the steel external mold top mouth of top board steel bar layer top, (8). allow concrete curing to the length of time, remove fastening system and steel external mold, steel strand are put, and foam core moulds precast hollow plate-girder is made.
In step (five), support each horizontal one concrete transfer beam parallel with foam core moulds of the outside of back of the body rib at each, the concrete transfer beam is provided with built-in fitting, support the outside, long limit that back of the body rib is welded in the steel external mold, support and be provided with the brace summer that supports back of the body rib be used to holding out against between back of the body rib bottom and the homonymy concrete transfer beam, support between the built-in fitting of carrying on the back rib top and homonymy concrete transfer beam and be connected with oblique connector, connector is the flower basket bolt of end connecting reinforcement, two of above-mentioned paired setting is supported between the back of the body rib top and is connected with cross-tie, described brace summer, support back of the body rib, connector, the described fastening system of the common formation of cross-tie.
At the pressure thick stick assembly described in the step (six), that the interval is placed two along the suitable long vertical beading bar to extending of foam core moulds on the top board steel bar layer, horizontal two horizontal pressure thick sticks that extend along the foam core moulds width at mouth interval, the top of steel external mold again, two laterally press thick stick and two vertical beading bars to be " well " font arranges, laterally press the thick stick two ends to be interspersed in respectively in the two pressure thick stick retainer rings that dual-side arranges on the steel external mold, laterally press to intert between thick stick end and the pressure thick stick retainer ring and press the thick stick pad, laterally pressing the place, crosspoint between thick stick and the vertical beading bar to fill in pad to fill gap between the two again.
Described fastening system arranges a plurality of along the suitable length of foam core moulds with pressing the thick stick assembly respectively to the interval.
Described cross-tie is adjusting screw, and described brace summer is supporting square timber, and pad is lumps of wood piece, and pressing the thick stick pad is dutchman.
Described foam core moulds is the polystyrene foam core.
Beneficial effect of the present invention is: press thick stick assembly and fastening system owing to adopt, can effectively stop the core come-up, guarantee the design thickness of precast hollow slab back plate and web, but and one-time-concreting moulding, guarantee the prefabricated quality of hollow slab beam, improved the operating efficiency of hollow slab beam formwork reinforcement.
Description of drawings
Fig. 1 is the hollow slab beam structure schematic diagram that technique of the present invention is made;
Fig. 2 is the I-I cross section view among Fig. 1.
The specific embodiment
By a kind of foam core moulds precast hollow slab beambracing job practices illustrated in figures 1 and 2, comprise following processing step: (one). first at the fixing steel strand 22 and carry out initial tensioning of precast pedestal 1, the baseplate reinforcing bar layer 3 of double steel bar web frame is placed precast pedestal 1 top and uses the iron wire colligation together, and steel strand 22 are interspersed between the double steel bar net of baseplate reinforcing bar layer 3, two web reinforcement layers, 5 colligation of top, baseplate reinforcing bar layer 3 both sides being stood at horizontally disposed baseplate reinforcing bar layer 3 and interval with iron wire together, baseplate reinforcing bar layer 3 and web reinforcement layer 5 all are positioned at the precast pedestal top, with iron wire concrete pad 2 outside the downside colligation of baseplate reinforcing bar layer 3 respectively, upside and the inboard colligation inner concrete of web reinforcement cushion block 4 at baseplate reinforcing bar layer 3, at this moment the baseplate reinforcing bar layer 3 that colligation is good and web reinforcement layer 5 prop up stand on the precast pedestal fully, (2). foam core moulds 7 levels of rectangular column are placed in the U-shaped space that baseplate reinforcing bar layer 3 and two web reinforcement layers 5 enclose, foam core moulds 7 for be horizontally disposed with and with web reinforcement layer 5, baseplate reinforcing bar layer 3, steel strand 22, before and after being, extends precast pedestal, to be horizontally disposed with iron wire, top board steel bar layer 8 colligations that extend front and back are between the top of two web reinforcement layers 5, top board steel bar layer 8 downside colligation inner concrete cushion blocks 4 in level, top board steel bar layer 8 is positioned at the top of foam core moulds 7, baseplate reinforcing bar layer 3, two web reinforcement layers 5 lay respectively at below and the both sides of foam core moulds 7, all inner concrete cushion blocks 4 offset with foam core moulds 7, inner concrete cushion block 4 is respectively in top board steel bar layer 8, two web reinforcement layers 5, play the effect of septal branch pad between baseplate reinforcing bar layer 3 and the foam core moulds 7, described top board steel bar layer 8, the web reinforcement layer 5 of both sides and the baseplate reinforcing bar layer 3 the same double steel bar web frame that is the interval setting, (3). integral tension steel strand 22, also want concrete pad 2 outside the colligation in the outside of web reinforcement layer 5, (4). outer concrete pad 2 is respectively between two web reinforcement layers 5 and steel external mold 11, play the effect of septal branch pad between baseplate reinforcing bar layer 3 and the precast pedestal 1, and then Zhi Ligang external mold 11, the steel external mold is penetrating about in the of 11, around the outside of two web reinforcements and the front and back end of foam core moulds 7, the bottom nozzle inner wall surrounding of steel external mold 11 is close to the surrounding of precast pedestal 1, because foam core moulds 7 extends for front and back, so the steel external mold 11 around foam core moulds 7 also extends for front and back, end-blocking is realized by the front and back end of steel external mold 11 respectively in the front and back end of foam core moulds 7, (5). at the arranged outside fastening system of steel external mold 11, fastening system comprises that pair of opposing is in the support back of the body rib 12 of steel external mold 11 both sides, and by pushing up pressure two support back of the body ribs 12 to tighten up the both sides of steel external mold 11, supporting back of the body rib 12 is the column shape, support each horizontal one concrete transfer beam 16 parallel with foam core moulds 7 of the outside of back of the body rib 12 at each, concrete transfer beam 16 is provided with built-in fitting 17, support the outside, long limit that back of the body rib 12 is welded in steel external mold 11, support and be provided with the brace summer that supports back of the body rib 12 be used to holding out against between back of the body rib 12 bottoms and the homonymy concrete transfer beam 16, brace summer is horizontal supporting square timber 15, support between the built-in fitting 17 of carrying on the back rib 12 tops and homonymy concrete transfer beam 16 and be connected with oblique connector, connector is the flower basket bolt 14 of end connecting reinforcement 9, the top of supporting back of the body rib 12 is higher than concrete transfer beam 16 and built-in fitting 17 thereof, so connector is oblique setting, the reinforcing bar 9 that flower basket bolt 14 tops connect is connected for hook with the top of supporting back of the body rib 12, flower basket bolt 14 bottoms connect built-in fitting 17, be connected with cross-tie 13 between support back of the body rib 12 tops that arrange in pairs in the fastening system, cross-tie 13 is used for tension steel external mold 11 and prevents that its top from toppling over laterally, described cross-tie 13 is adjusting screw, the two ends of adjusting screw all arrange screw thread, the two ends of adjusting screw are inserted respectively two and are supported behind the tie rod hole on back of the body ribs 12 tops again fastening nut, to control two spacings that support between back of the body ribs 12 tops.Above-mentioned brace summer 15, support back of the body rib 12, connector, the described fastening system of cross-tie 13 common formations.At this moment, support back of the body rib 12 bottoms with brace summer 15(supporting square timber) withstand, supporting back of the body rib 12 tops holds with cross-tie 13 and connector, (6). by regulate cross-tie 13 and 14 pairs of steel external mold 11 adjustment of flower basket bolt complete after, pressure thick stick assembly 6 is set at mouth place, the top of steel external mold 11, pressing thick stick assembly 6 is that the interval is placed two along foam core moulds 7 suitable long vertical beading bars 18 to extending on top board steel bar layer 8, horizontal two horizontal pressure thick sticks 20 that extend along foam core moulds 7 widths at mouth interval, the top of steel external mold 11 again, two laterally press thick stick 20 and two vertical beading bars 18 to be " well " font arranges, laterally pressing thick stick 20 two ends to be interspersed in respectively two of steel external mold 11 top dual-sides settings presses in the thick stick retainer rings 19, laterally press thick stick 20 ends and press the interspersed thick stick pad of pressing between the thick stick retainer ring 19, pressing the thick stick pad is dutchman 10, loosening to prevent laterally pressing thick stick 20, laterally pressing the place, crosspoint between thick stick 20 and the vertical beading bar 18 to fill in pad to fill gap between the two again, pad is lumps of wood piece 21, vertically beading bar 18 and top board steel bar layer 8 all are lower than the top mouth of steel external mold 11, and described fastening system arranges a plurality of along the suitable length of foam core moulds 7 with pressing thick stick assembly 6 respectively to the interval.(7). from the top mouth concreting of steel external mold 11, when concreting to top board steel bar layer 8 tops, contain foam core moulds 7 end faces fully, fast dismantling continues concreting to the steel external mold 11 top mouths of top board reinforcing bar top again except pressing thick stick assembly 6, and at this moment concrete is built finish fully, (8). allow concrete curing to the length of time, remove fastening system and steel external mold 11, steel strand 22 are put opened, foam core moulds precast hollow plate-girder is made.
Foam core moulds 7 can adopt polystyrene foam core 7, certainly, also can adopt the foam core moulds 7 of other materials.Fixing and the stretch-draw of steel strand 22 is prior art, so be not described in detail.Above-described embodiment is as example take top board steel bar layer 8, web reinforcement layer 5 and baseplate reinforcing bar layer 3 as the double steel bar stratum reticulare, but the present invention is not limited to above-mentioned form, in like manner, top board steel bar layer 8, web reinforcement layer 5 and baseplate reinforcing bar layer 3 also can be individual layer reinforcing bar stratum reticulare or multistory reinforced net-layer structure, only need that steel strand 22 are arranged at baseplate reinforcing bar layer 3 place and get final product; And step (one)---in arbitrary step of (three), all can be outside the colligation of the outside of web reinforcement layer 5 concrete pad 2, as long as before Zhi Ligang external mold 11.
Among the present invention, press thick stick assembly 6 to be used for compacting foam core moulds 7, prevent foam core moulds 7 come-ups, between steel external mold 11 top mouthful and the foam core moulds 7, between precast pedestal 1 and the foam core moulds 7, formation is similar to the three-back-shaped space of building between steel external mold 11 and the foam core moulds 7, whole pressure thick stick assembly 6 is used for by compacting top board steel bar layer 8, and then compacting foam core moulds 7, avoid foam core moulds 7 come-ups when concreting, cause reducing the top board of precast hollow plate-girder and the thickness of web.Two of each fastening system supports back of the body rib 12 relatively in order to regulate the width of control steel external mold 11, brace summer 15 is carried on the back the bottom of rib 12 to hold out against the bottom of steel external mold 11 in order to prop up support, prevent that steel external mold 11 bottoms from extending out, cross-tie 13 is by the top cross dimensions of the top mouth spacing between the adjusting two support back of the body ribs 12 with adjusting steel external mold 11, the top mouth that prevents steel external mold 11 extends out, the flexible flower basket bolt 14 of tension bidirectional modulation, to prevent the top mouth introversion of steel external mold 11, described fastening system arranges a plurality of along the suitable length of foam core moulds 7 with pressing thick stick assembly 6 respectively to the interval.
A kind of foam core moulds precast hollow slab beambracing job practices of the present invention, the precast hollow plate-girder that produces adopts foam core moulds 7 as the inner die of precast hollow plate-girder, top board steel bar layer 8, web reinforcement layer 5 and the baseplate reinforcing bar layer 3 common cage of reinforcement that consists of whole prefabricated concrete hollow slab beam, the cross sectional shape of hollow slab beam is determined by the interior cross sectional shape of steel external mold 11, behind the moulding by casting, exempt to tear open foam core moulds 7.
Claims (6)
1. foam core moulds precast hollow slab beambracing job practices, it is characterized in that: comprise following processing step: (one). first at the fixing steel strand and carry out initial tensioning of precast pedestal, the two web reinforcement layer colligation of top, baseplate reinforcing bar layer both sides being stood at horizontally disposed baseplate reinforcing bar layer and interval with iron wire together, baseplate reinforcing bar layer and web reinforcement layer all are positioned at the precast pedestal top, steel strand are positioned at baseplate reinforcing bar layer place, with iron wire concrete pad outside the downside colligation of baseplate reinforcing bar layer respectively, at the upside of baseplate reinforcing bar layer and the inboard colligation inner concrete cushion block of web reinforcement layer, at this moment the baseplate reinforcing bar layer that colligation is good and web reinforcement layer prop up stand on the precast pedestal fully, (2). the foam core moulds level of column is placed in the U-shaped space that baseplate reinforcing bar layer and two web reinforcement layers enclose, foam core moulds for be horizontally disposed with and with the web reinforcement layer, the baseplate reinforcing bar layer, steel strand, before and after being, extends precast pedestal, to be horizontally disposed with iron wire, the top board steel bar layer colligation that extend front and back is between two web reinforcement layer top, at top board steel bar layer downside also colligation inner concrete cushion block, the top board steel bar layer is positioned at the top of foam core moulds, (3). the integral tension steel strand, (4). step (one)---in arbitrary step of (three) outside the colligation of the web reinforcement outside concrete pad, and then Zhi Ligang external mold, the steel external mold is penetrating up and down, around the outside of two web reinforcements and the front and back end of foam core moulds, the bottom nozzle inner wall surrounding of steel external mold is close to the surrounding of precast pedestal, (5). at the arranged outside fastening system of steel external mold, fastening system comprises that pair of opposing is in the support back of the body rib of steel external mold both sides, press two to support back of the body rib to tighten up the both sides of steel external mold by the top, (6). after the adjustment of steel external mold is complete, pressure thick stick assembly is set at mouth place, the top of steel external mold, (7). concreting, when concreting to top board steel bar layer top, and contain the foam core moulds end face fully, remove and press the thick stick assembly, continue again concreting to the steel external mold top mouth of top board steel bar layer top, (8). allow concrete curing to the length of time, remove fastening system and steel external mold, steel strand are put, and foam core moulds precast hollow plate-girder is made.
2. a kind of foam core moulds precast hollow slab beambracing job practices as claimed in claim 1, it is characterized in that: in step (five), support each horizontal one concrete transfer beam parallel with foam core moulds of the outside of back of the body rib at each, the concrete transfer beam is provided with built-in fitting, support the outside, long limit that back of the body rib is welded in the steel external mold, support and be provided with the brace summer that supports back of the body rib be used to holding out against between back of the body rib bottom and the homonymy concrete transfer beam, support between the built-in fitting of carrying on the back rib top and homonymy concrete transfer beam and be connected with oblique connector, connector is the flower basket bolt of end connecting reinforcement, two of above-mentioned paired setting is supported between the back of the body rib top and is connected with cross-tie, described brace summer, support back of the body rib, connector, the described fastening system of the common formation of cross-tie.
3. a kind of foam core moulds precast hollow slab beambracing job practices as claimed in claim 1 or 2, it is characterized in that: at the pressure thick stick assembly described in the step (six), that the interval is placed two along the suitable long vertical beading bar to extending of foam core moulds on the top board steel bar layer, horizontal two horizontal pressure thick sticks that extend along the foam core moulds width at mouth interval, the top of steel external mold again, two laterally press thick stick and two vertical beading bars to be " well " font arranges, laterally press the thick stick two ends to be interspersed in respectively in the two pressure thick stick retainer rings that dual-side arranges on the steel external mold, laterally press to intert between thick stick end and the pressure thick stick retainer ring and press the thick stick pad, laterally pressing the place, crosspoint between thick stick and the vertical beading bar to fill in pad to fill gap between the two again.
4. a kind of foam core moulds precast hollow slab beambracing job practices as claimed in claim 3 is characterized in that: described fastening system with press the thick stick assembly respectively along foam core moulds along long arrange to the interval a plurality of.
5. a kind of foam core moulds precast hollow slab beambracing job practices as claimed in claim 4, it is characterized in that: described cross-tie is adjusting screw, and described brace summer is supporting square timber, and pad is lumps of wood piece, and pressing the thick stick pad is dutchman.
6. a kind of foam core moulds precast hollow slab beambracing job practices as claimed in claim 5, it is characterized in that: described foam core moulds is the polystyrene foam core.
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| CN201210155675.4A CN103046465B (en) | 2012-05-19 | 2012-05-19 | Reinforcing construction method for foam core die precast hollow plate beam |
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| CN201210155675.4A CN103046465B (en) | 2012-05-19 | 2012-05-19 | Reinforcing construction method for foam core die precast hollow plate beam |
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| CN105196405B (en) * | 2015-10-21 | 2017-05-17 | 宁夏路桥工程股份有限公司 | Supporting equipment for bridge precast hollow slab lateral mould and using method of supporting equipment |
| CN106400673A (en) * | 2016-05-23 | 2017-02-15 | 中交第航务工程局有限公司 | Novel mounting method of anchor pulling block |
| CN107988876A (en) * | 2017-10-27 | 2018-05-04 | 济南城建集团有限公司 | A kind of Long span concrete structure section construction method |
| CN109149497A (en) * | 2018-10-16 | 2019-01-04 | 洪火权 | Using the cable ditch construction method of integral movable type plate device |
| CN110409308A (en) * | 2019-07-31 | 2019-11-05 | 佛山科学技术学院 | A kind of secondary construction method for pouring cored slab |
| CN112211107A (en) * | 2020-10-30 | 2021-01-12 | 中交路桥建设有限公司 | Tensioning notch template structure and method for ensuring welding length of cut steel bars of tensioning groove |
| CN112502047A (en) * | 2020-11-30 | 2021-03-16 | 中铁大桥局集团第二工程有限公司 | Method for erecting simply supported PC track beam and linear debugging device |
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